Long-acting broad-spectrum antibacterial stone-like paint production line and process

Abstract

The application discloses a long-acting broad-spectrum antibacterial imitation stone paint production line, which comprises premixing kettles, a mixing reactor and a paint adjusting kettle arranged in sequence, wherein the mixing reactor comprises a shell, a stator assembly, a rotor assembly, an elastic reset member and a driving shaft, the stator assembly is arranged in the shell, the rotor assembly is installed on the driving shaft and placed in the interior of the stator assembly, and a radial shearing gap is formed between the inner circumferential surface of the stator assembly and the outer circumferential surface of the rotor assembly; wherein the stator assembly comprises a stator ring, the stator ring is radially floating relative to the shell, a radial guide groove is formed in the inner wall of the shell, the elastic reset member is arranged on the radial guide groove, the elastic reset member is located between the shell and the stator ring and is fixedly connected, and a flow guide groove extending in the axial direction is formed in the inner circumferential surface of the stator ring; and the application realizes continuous and stable production of nanometer titanium dioxide calcium phosphate coating and silver loading, thereby guaranteeing coating uniformity and antibacterial activity.

Description

Technical Field

[0001] This invention relates to the technical field of building coating production equipment, specifically to a long-lasting broad-spectrum antibacterial stone-like paint production line and process. Background Technology

[0002] The core function of long-lasting broad-spectrum antibacterial stone-like paint comes from a composite antibacterial agent. The preparation of this antibacterial agent requires the instantaneous micro-mixing in a nano-titanium dioxide suspension to complete the calcium phosphate coating and silver loading. Existing production lines mostly use stator-rotor type mixing reactors, relying on the micron-level gap between the stator and rotor to form a strong shear field to achieve rapid micro-mixing.

[0003] However, nano-titanium dioxide readily forms soft aggregates, and calcium phosphate particles are simultaneously generated during the reaction. When slurry containing this solid phase continuously passes through narrow gaps, the solid phase deposits, bridges, and gradually compacts at the gap inlet and dead zone, rapidly causing channel blockage and forcing shutdown for disassembly and cleaning, making continuous operation of the production line impossible. If the gap is simply enlarged to prevent blockage, the shear rate and turbulent energy dissipation rate drop sharply, mixing degenerates into macroscopic stirring, and the uniformity of coating is lost, directly leading to insufficient antibacterial agent activity and batch quality fluctuations. Summary of the Invention

[0004] The purpose of this invention is to provide a long-lasting, broad-spectrum antibacterial stone-like paint production line and process to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a long-lasting broad-spectrum antibacterial imitation stone paint production line, comprising a premixing kettle, a mixing reactor, and a paint mixing kettle arranged sequentially. The mixing reactor includes a shell, a stator assembly, a rotor assembly, an elastic reset component, and a drive shaft. The stator assembly is disposed inside the shell, and the rotor assembly is mounted on the drive shaft and placed inside the stator assembly. A radial shear gap is formed between the inner circumferential surface of the stator assembly and the outer circumferential surface of the rotor assembly. The stator assembly includes a stator ring that floats radially relative to the housing. A radial guide groove is provided on the inner wall of the housing, and an elastic reset member is provided on the radial guide groove. The elastic reset member is located between the housing and the stator ring and is fixedly connected. The stator ring has an axially extending guide groove on its inner circumferential surface, and the rotor assembly includes a rotor with a helical propulsion protrusion on its outer circumferential surface.

[0006] Preferably, the top of the inner wall of the housing is provided with a stepped annular groove, and the bottom surface of the stepped annular groove is stepped from the inside to the outside in the radial direction.

[0007] Preferably, the stator ring has an overlapping ring at its top edge, and a flow-blocking ring is provided at the top of the overlapping ring. The overlapping ring is slidably engaged with the bottom of the stepped annular groove, and the flow-blocking ring is slidably engaged with the top of the stepped annular groove.

[0008] Preferably, the bottom of the inner wall of the housing is provided with a bottom annular groove, and a bottom retaining ring is provided at the bottom edge of the stator ring. When the flow-blocking retaining ring contacts the top side of the stepped annular groove, a partial blockage is formed between the bottom retaining ring and the bottom annular groove.

[0009] Preferably, the spiral propulsion protrusion has the same rotation direction as the rotor assembly, and auxiliary shearing teeth extending axially are provided on the outer circumferential surface of the rotor, with the auxiliary shearing teeth located between adjacent spiral propulsion protrusions.

[0010] Preferably, the height of the auxiliary shearing tooth is less than the height of the helical propulsion protrusion, and the top of the auxiliary shearing tooth is provided with an inclined guide surface, which transitions from a radially high position to a radially low position along the rotation direction of the rotor assembly.

[0011] Preferably, the bottom outlet of the premixing kettle is connected to the inlet of the mixing reactor through a first conveying pipeline, the first conveying pipeline being equipped with a conveying pump and a flow control valve, and the outlet of the mixing reactor is connected to the paint mixing kettle through a second conveying pipeline.

[0012] Preferably, a pipeline reactor is connected in series on the second delivery pipeline, and a silver nitrate solution injection branch with a metering pump is provided at the upstream end of the pipeline reactor.

[0013] Preferably, an annular liquid collection chamber is provided at the bottom edge of the shell, the annular liquid collection chamber is connected to the interior of the shell, and the bottom drain of the annular liquid collection chamber is connected to the second conveying pipeline through the third conveying pipeline, and a one-way valve is provided on the third conveying pipeline.

[0014] A process for a long-lasting broad-spectrum antibacterial stone-like paint, applied in a production line for this paint, includes the following steps: S1: In a premixing vessel, nano-titanium dioxide is dispersed in water to obtain a suspension, and ammonium dihydrogen phosphate solution and calcium nitrate solution are added for premixing; S2: The premixed slurry is fed into the mixing reactor through the first conveying pipeline. The rotor assembly rotates, and the slurry is subjected to high shear in the radial shear gap to achieve instantaneous micro-mixing. At the same time, the spiral propulsion protrusion pushes the slurry to move axially, and the guide groove causes radial pulsation. When the local solid phase deposit causes the resistance to increase, the stator ring at the corresponding position floats radially outward under the action of slurry pressure, overcoming the pre-tightening force of the elastic reset member, so that the gap is widened instantaneously to allow the deposit to pass through. Then the elastic reset member drives it to reset. S3: The composite powder suspension that has completed the coating reaction enters the pipeline reactor from the outlet of the mixing reactor along the second conveying pipeline. At the same time, the metering pump injects silver nitrate solution to complete the ion exchange loading of silver in the pipeline reactor to obtain the composite antibacterial agent. The clear liquid collected in the annular collection chamber is mixed with the composite powder suspension in the third and second conveying pipelines and then enters the pipeline reactor together. S4: The composite antibacterial agent is mixed with silicone acrylic emulsion, natural colored sand, additives and water in a paint mixing kettle to obtain a long-lasting broad-spectrum antibacterial imitation stone paint.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention sets the stator ring as a radially floating structure and sets an elastic reset component to apply a pre-tightening force. When the flow channel resistance increases due to local solid deposition in the mixing reactor, the stator ring at the corresponding part can adaptively float outward to instantly widen the shear gap, allowing the deposits to pass through quickly. After passing through, it immediately resets. While maintaining a micron-level strong shear gap throughout the process to ensure uniform coating, it solves the problem of forced shutdown and disassembly for cleaning due to solid bridging blockage in narrow gaps.

[0016] 2. The present invention enhances micro-dispersion while providing axial conveying thrust through the spiral propulsion protrusions and auxiliary shearing teeth set on the outer circumference of the rotor; the guide grooves opened on the inner circumference of the stator ring induce radial pulsation, effectively breaking up soft agglomerates of nanoparticles. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the long-lasting broad-spectrum antibacterial stone-like paint production line of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the mixing reactor of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention.

[0020] Figure 4 This is a schematic diagram of the stator assembly and rotor assembly of the present invention.

[0021] Figure 5 This is a schematic diagram of the rotor assembly of the present invention.

[0022] Figure 6 This is a schematic diagram of the stator assembly of the present invention.

[0023] Figure 7 This is a schematic diagram of the annular liquid collection cavity of the present invention.

[0024] In the diagram: 1-Premixing vessel; 11-First delivery pipeline; 12-Delivery pump; 13-Flow control valve; 2-Mixing reactor; 21-Shell; 22-Radial guide groove; 23-Stepped annular groove; 24-Bottom annular groove; 25-Second delivery pipeline; 3-Paint mixing vessel; 4-Stator assembly; 41-Stator ring; 42-Flow guide groove; 43-Overlap ring; 44-Flow obstruction ring; 45-Bottom obstruction ring; 5-Rotor assembly; 51-Rotor; 52-Spiral propulsion protrusion; 53-Auxiliary shearing teeth; 6-Elastic reset element; 7-Drive shaft; 8-Pipeline reactor; 81-Metering pump; 9-Annular collection chamber; 91-Check valve; 10-Third delivery pipeline. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1 This invention provides a technical solution: a long-lasting, broad-spectrum antibacterial stone-like paint production line, comprising a premixing tank 1, a mixing reactor 2, and a paint mixing tank 3 arranged sequentially, wherein the mixing reactor 2 is the core equipment of this production line, such as... Figure 2 and Figure 3 As shown, the mixing reactor 2 includes a shell 21, a stator assembly 4, a rotor assembly 5, an elastic reset member 6, and a drive shaft 7. The shell 21 is a vertically arranged cylindrical pressure vessel. The top of the shell 21 is fixed with an end cover by bolts. The drive shaft 7 is rotatably supported by bearing assemblies in the upper and lower end covers. The lower end of the drive shaft 7 is coaxially fixed to the output shaft of the geared motor through a coupling to obtain rotational power.

[0027] The stator assembly 4 is integrally disposed in the inner cavity of the housing 21, and the rotor assembly 5 is fixedly mounted on the drive shaft 7 and placed inside the stator assembly 4. There is an annular gap between the inner circumferential surface of the stator assembly 4 and the outer circumferential surface of the rotor assembly 5. This gap is the radial shear gap, which is used to apply high shear to the flowing slurry.

[0028] The stator assembly 4 includes a stator ring 41. The stator ring 41 is not rigidly fixed to the housing 21, but can float in a constrained manner relative to the housing 21 along the radial direction of the housing 21. Radial guide grooves 22 are evenly distributed along the circumference on the inner wall of the housing 21. Each radial guide groove 22 is provided with an elastic reset member 6. The elastic reset member 6 is a pre-compressed cylindrical helical spring. One end of the spring abuts against and is welded to the bottom of the radial guide groove 22, and the other end is fixedly connected to the outer circumference of the stator ring 41. This applies a radial preload pointing towards the center to the stator ring 41, pushing it inward.

[0029] Under normal operating conditions, the stator ring 41 is in the radial limit position closest to the center under the preload of the elastic reset member 6, ensuring that the radial shear gap between the inner circumferential surface of the stator ring 41 and the outer circumferential surface of the rotor assembly 5 is maintained at a set micron-level narrow gap, thereby generating extremely strong shear rate and turbulent energy dissipation, and realizing instantaneous micro-mixing.

[0030] like Figure 4 As shown, when nano-titanium dioxide soft agglomerates or newly generated calcium phosphate particles in the slurry gradually deposit and bridge at the inlet or dead zone of the narrow gap, causing a sharp increase in local flow resistance, the radial pressure acting on the inner wall of the stator ring 41 in this local area will instantly exceed the pre-tightening force of the elastic reset member 6, forcing the stator ring 41 in the corresponding position to float outward along the radial guide groove 22, causing the shear gap at that location to widen instantaneously, allowing the accumulated solid phase to pass through quickly. After the deposits pass through, the local pressure disappears, and the pre-tightening force of the elastic reset member 6 immediately drives the stator ring 41 to reset, and the shear gap returns to the micron-level narrow gap state, continuing high-shear mixing. This allows the mixing reactor to maintain a strong shear field by relying on the narrow gap to ensure uniform coating, without being forced to shut down and disassemble due to local solid phase blockage.

[0031] like Figure 6 As shown, to enhance the micro-mixing of the slurry within a narrow gap, a guide groove 42 extending axially is provided on the inner circumferential surface of the stator ring 41. The guide groove 42 is a long groove with a rectangular cross-section, which is arranged at intervals along the circumference. When the rotor assembly 5 rotates, a periodically changing radial gap is formed between the cylindrical surface corresponding to the outer circumferential surface of the rotor and the inner circumferential surface with the guide groove 42. This induces strong radial pulsation and vortex in the fluid, which can effectively break up the nano-titanium dioxide soft agglomerates and transfer high shear energy to the entire flow cross-section, preventing solids from adhering to the stator wall and gradually depositing.

[0032] like Figure 5As shown, the rotor assembly 5 includes a rotor 51 that rotates synchronously with the drive shaft 7. The rotor 51 is a cylinder and is fixedly connected to the drive shaft 7 by a key and a shoulder. A spiral propulsion protrusion 52 extending axially is provided on the outer circumferential surface of the rotor 51. The spiral direction of the spiral propulsion protrusion 52 is consistent with the rotation direction of the rotor 51. When the rotor 51 rotates, the spiral propulsion protrusion 52 acts like a screw conveyor, applying axial thrust to the slurry flowing through the shear gap, causing it to move steadily from the lower inlet to the top outlet, preventing the slurry from stagnating in the gap. Simultaneously, the spiral propulsion protrusion 52 itself also performs cutting and shearing actions on the slurry.

[0033] To further enhance the shearing effect, multiple axially extending auxiliary shearing teeth 53 are provided on the outer circumferential surface of the rotor 51. These auxiliary shearing teeth 53 are located within the circumferential region between two adjacent helical propulsion protrusions 52. The radial height of the auxiliary shearing teeth 53 is less than the height of the helical propulsion protrusions 52, ensuring they do not occupy the main propulsion channel. The top of the auxiliary shearing teeth 53 is provided with an inclined guide surface, which extends in the direction of rotation of the rotor assembly 5, transitioning from a radially higher position to a radially lower position. The purpose of this structure is to: the auxiliary shearing teeth can violently disturb the flow boundary layer close to the rotor wall, providing supplementary shearing to break up small agglomerates; while their smaller tooth height and inclined guide surface design avoid forming obstructive steps on the axial propulsion flow, preventing particle accumulation in front of the teeth, and allowing solid particles touching the tooth surface to slide along the inclined surface into a higher shearing region without being forcibly compressed into clumps.

[0034] like Figure 3 and Figure 4 As shown, in order to achieve reliable guidance and sealing of the stator ring 41 during the floating process, a stepped annular groove 23 is provided on the top of the inner wall of the housing 21. The bottom surface of the stepped annular groove 23 is stepped in a radial direction from the inside to the outside. An outwardly overlapping ring 43 is integrally formed at the top edge of the stator ring 41. The lower end face of the overlapping ring 43 slides and fits against the bottom surface of the stepped annular groove 23 near the inside, forming the first guiding surface during radial floating. The top end face of the overlapping ring 43 also extends upward and outward to form a flow-blocking ring 44. The radial dimension of the flow-blocking ring 44 is larger than that of the overlapping ring 43, and its lower end face slides and fits against the top stepped surface of the outermost edge of the stepped annular groove 23.

[0035] When the stator ring 41 is pushed to its innermost radial position by the elastic reset member 6, the radial inner side of the flow-blocking ring 44 is in contact with the stepped vertical surface of the top side of the stepped annular groove 23. This multi-stage stepped sliding fit between the overlapping ring 43, the flow-blocking ring 44 and the stepped annular groove 23 not only provides precise radial and axial guidance for the floating of the stator ring 41, but also effectively prevents a large amount of slurry from leaking upward from the shear gap to the drive shaft sealing area, thus protecting the bearing.

[0036] The bottom of the inner wall of the housing 21 is provided with a bottom annular groove 24, and a bottom retaining ring 45 extends radially from the bottom edge of the stator ring 41. When the stator ring 41 is at the innermost radial limit position, the radial outer edge of the bottom retaining ring 45 just extends into the bottom annular groove 24. The two form a partial shield in the radial projection to prevent the raw material at the bottom from overflowing between the housing 21 and the stator ring 41.

[0037] like Figure 2 and Figure 7 As shown, an annular collection chamber 9 is fixedly welded to the bottom edge of the shell 21 for collecting the clear liquid. The annular chamber of the annular collection chamber 9 is connected to the inside of the shell 21 through the bottom annular groove 24. A drain port is opened at the bottom of the annular collection chamber 9. The drain port is connected to the third conveying pipeline 10 through a flange. A one-way valve 91 is installed on the third conveying pipeline 10 to ensure that the material can only be discharged from the annular collection chamber 9. The other end of the third conveying pipeline 10 merges into the second conveying pipeline 25. A pipeline reactor 8 is connected in series on the second conveying pipeline 25. The pipeline reactor 8 is a tubular reactor filled with static mixing elements. Its upstream end is provided with a silver nitrate solution injection branch with a metering pump 81. This branch is connected to the second conveying pipeline 25 through a three-way fitting.

[0038] The clear liquid collected in the annular collection chamber 9 is combined with the composite powder suspension in the third conveying pipeline 10 and the second conveying pipeline 25 and enters the pipeline reactor 8 together. This setting allows the unreacted ions still contained in the sheared and separated clear liquid to enter the subsequent loading process with the mainstream, avoiding the loss of effective components, and preventing the enriched ions from staying for a long time and causing scaling.

[0039] The discharge port at the bottom of the premixing tank 1 is connected to the inlet at the bottom of the mixing reactor 2 via the first conveying pipeline 11. The first conveying pipeline 11 is equipped with a conveying pump 12 and a flow control valve 13, which are fixedly connected by flanges and bolts, respectively, to accurately and stably deliver the slurry prepared in the premixing tank 1 into the mixing reactor 2 at a set flow rate. The discharge port at the top of the mixing reactor 2 is finally connected to the paint mixing tank 3 via the second conveying pipeline 25.

[0040] A process for a long-lasting broad-spectrum antibacterial stone-like paint, applied in a production line for this paint, includes the following steps: S1: In premixing vessel 1, nano-titanium dioxide powder is dispersed in deionized water under stirring to obtain a suspension. Then, metered amounts of ammonium dihydrogen phosphate solution and calcium nitrate solution are added for premixing. This step pre-disperses the reactants evenly to form a slurry that can be used for the coating reaction.

[0041] S2: Start the delivery pump 12 and adjust the flow control valve 13 to continuously feed the premixed slurry into the mixing reactor 2 through the first delivery pipeline 11. At the same time, the drive shaft 7 drives the rotor 51 to rotate at high speed. The slurry enters the radial shear gap between the stator assembly 4 and the rotor assembly 5; Here, the narrow micron-level gap generates a shear rate, causing ammonium dihydrogen phosphate and calcium nitrate to come into instantaneous contact on the surface of nano-titanium dioxide and undergo a micro-uniform precipitation reaction, rapidly forming a uniform and dense calcium phosphate coating layer. The spiral propulsion protrusion 52 continuously pushes the slurry upward along the axial direction. The radial pulsation caused by the guide groove 42 and the auxiliary shear teeth 53 on the rotor circumference work together to continuously break up the soft agglomeration of nanoparticles, ensuring the uniformity of the coating. When the flow channel resistance increases sharply due to local solid deposition during operation, the stator ring 41 at the corresponding part overcomes the pre-tightening force of the elastic reset member 6 and floats outward radially, instantly widening the gap and allowing the deposited agglomerates to pass through. After passing through, it immediately resets under the elastic force, avoiding complete blockage of the flow channel, realizing continuous production, and maintaining the overall strong shear mixing condition.

[0042] S3: The composite powder suspension that has completed the coating reaction is continuously pressed out from the discharge port at the top of the mixing reactor 2 and enters the pipeline reactor 8 along the second conveying pipeline 25. Meanwhile, metering pump 81 precisely injects silver nitrate solution according to the stoichiometric ratio. The two fluids come into contact with each other under the action of the static mixing element in the pipeline reactor 8, resulting in intense turbulent contact and ion exchange on the surface of the calcium phosphate-coated particles. Silver ions are loaded in situ into the calcium phosphate coating layer, forming a silver-loaded composite antibacterial agent. The annular collection chamber 9, through the dynamic cooperation of the bottom baffle ring 45 and the bottom annular groove 24, promptly collects the overflowing clear liquid and returns it via check valve 91 and the third delivery pipeline 10 to the main stream of the second delivery pipeline 25, where it enters the pipeline reactor 8 together. This recycling ensures that the clear liquid carrying unreacted calcium and phosphate ions can continue to participate in the loading reaction, improving raw material utilization.

[0043] S4: The composite antibacterial agent suspension flowing out of the pipeline reactor 8 is sent to the paint mixing tank 3 and mixed with silicone acrylic emulsion, natural colored sand, various additives and deionized water according to the formula ratio. After high-speed dispersion and paint mixing process, the stone-like paint with long-lasting broad-spectrum antibacterial function is finally obtained.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-lasting broad-spectrum antibacterial imitation stone paint production line, comprising a premixing tank (1), a mixing reactor (2), and a paint mixing tank (3) arranged sequentially, characterized in that: The mixing reactor (2) includes a shell (21), a stator assembly (4), a rotor assembly (5), an elastic reset member (6), and a drive shaft (7). The stator assembly (4) is disposed inside the shell (21), and the rotor assembly (5) is mounted on the drive shaft (7) and placed inside the stator assembly (4). A radial shear gap is formed between the inner circumferential surface of the stator assembly (4) and the outer circumferential surface of the rotor assembly (5). The stator assembly (4) includes a stator ring (41), which floats radially relative to the housing (21). A radial guide groove (22) is provided on the inner wall of the housing (21), and an elastic reset member (6) is provided on the radial guide groove (22). The elastic reset member (6) is located between the housing (21) and the stator ring (41) and is fixedly connected. The stator ring (41) has an axially extending guide groove (42) on its inner circumferential surface. The rotor assembly (5) includes a rotor (51) and a spiral propulsion protrusion (52) is provided on the outer circumferential surface of the rotor (51).

2. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: The inner wall of the shell (21) is provided with a stepped annular groove (23) at the top, and the bottom surface of the stepped annular groove (23) is stepped from the inside to the outside in the radial direction.

3. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: A lap ring (43) is provided at the top edge of the stator ring (41), and a flow-blocking ring (44) is provided at the top of the lap ring (43). The lap ring (43) slides with the bottom of the stepped annular groove (23), and the flow-blocking ring (44) slides with the top of the stepped annular groove (23).

4. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: The inner wall of the housing (21) has a bottom annular groove (24) and a bottom retaining ring (45) is provided at the bottom edge of the stator ring (41). When the flow-blocking retaining ring (44) contacts the top side of the stepped annular groove (23), a partial block is formed between the bottom retaining ring (45) and the bottom annular groove (24).

5. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: The spiral propulsion protrusion (52) has the same rotation direction as the rotor assembly (5). The outer circumferential surface of the rotor (51) is provided with auxiliary shearing teeth (53) extending along the axial direction. The auxiliary shearing teeth (53) are located between adjacent spiral propulsion protrusions (52).

6. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: The height of the auxiliary shearing tooth (53) is less than the height of the spiral propulsion protrusion (52). The top of the auxiliary shearing tooth (53) is provided with an inclined guide surface, which transitions from a radially high position to a radially low position along the rotation direction of the rotor assembly (5).

7. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: The bottom outlet of the premixing vessel (1) is connected to the inlet of the mixing reactor (2) through the first conveying pipeline (11). The first conveying pipeline (11) is equipped with a conveying pump (12) and a flow control valve (13). The outlet of the mixing reactor (2) is connected to the paint mixing vessel (3) through the second conveying pipeline (25).

8. The long-lasting broad-spectrum antibacterial stone-like paint production line according to claim 1, characterized in that: A pipeline reactor (8) is connected in series on the second delivery pipeline (25), and a silver nitrate solution injection branch with a metering pump (81) is provided at the upstream end of the pipeline reactor (8).

9. A long-lasting broad-spectrum antibacterial imitation stone paint production line according to claim 1, characterized in that: An annular liquid collection chamber (9) is provided at the bottom edge of the housing (21). The annular liquid collection chamber (9) is connected to the interior of the housing (21). The bottom drain of the annular liquid collection chamber (9) is connected to the second conveying pipeline (25) through the third conveying pipeline (10). A one-way valve (91) is provided on the third conveying pipeline (10).

10. A process for a long-lasting, broad-spectrum antibacterial, stone-like paint, characterized in that: This process is applied in the long-lasting broad-spectrum antibacterial stone-like paint production line as described in any one of claims 1-9, and the process includes the following steps: S1: In the premixing vessel (1), nano-titanium dioxide is dispersed in water to obtain a suspension, and ammonium dihydrogen phosphate solution and calcium nitrate solution are added for premixing; S2: The premixed slurry is fed into the mixing reactor (2) through the first conveying pipeline (11). The rotor assembly (5) rotates, and the slurry is subjected to high shear in the radial shear gap to achieve instantaneous micro-mixing. At the same time, the spiral propulsion protrusion (52) pushes the slurry to move along the axial direction, and the guide groove (42) causes radial pulsation. When the local solid phase deposit causes the resistance to increase, the stator ring (41) at the corresponding position floats outward along the radial direction under the action of the slurry pressure to overcome the pre-tightening force of the elastic reset member (6), so that the gap is widened instantaneously to allow the deposit to pass through. Then the elastic reset member (6) drives it to reset. S3: The composite powder suspension that has completed the coating reaction enters the pipeline reactor (8) from the outlet of the mixing reactor (2) along the second conveying pipeline (25). At the same time, the metering pump (81) injects silver nitrate solution, and the silver is loaded with ion exchange in the pipeline reactor (8) to obtain a composite antibacterial agent. The clear liquid collected in the annular collection chamber (9) is mixed with the composite powder suspension in the third conveying pipeline (10) and the second conveying pipeline (25) and then enters the pipeline reactor (8) together. S4: The composite antibacterial agent is mixed with silicone acrylic emulsion, natural colored sand, additives and water in a paint mixing kettle (3) to obtain a long-lasting broad-spectrum antibacterial imitation stone paint.

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